1 /* 2 * Copyright (c) 2011-2015 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@dragonflybsd.org> 6 * by Venkatesh Srinivas <vsrinivas@dragonflybsd.org> 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in 16 * the documentation and/or other materials provided with the 17 * distribution. 18 * 3. Neither the name of The DragonFly Project nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific, prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 26 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 31 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 32 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 #include <sys/types.h> 36 #include <sys/param.h> 37 #include <sys/mount.h> 38 #include <sys/socket.h> 39 #include <netinet/in.h> 40 #include <vfs/hammer2/hammer2_mount.h> 41 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <stdarg.h> 45 #include <string.h> 46 #include <unistd.h> 47 #include <dmsg.h> 48 #include <mntopts.h> 49 50 static int cluster_connect(const char *volume); 51 static void usage(const char *ctl, ...); 52 53 static struct mntopt mopts[] = { 54 MOPT_STDOPTS, 55 { "update", 0, MNT_UPDATE, 0 }, 56 { "local", 0, HMNT2_LOCAL, 1 }, 57 MOPT_NULL 58 }; 59 60 /* 61 * Usage: mount_hammer2 [volume] [mtpt] 62 */ 63 int 64 main(int ac, char *av[]) 65 { 66 struct hammer2_mount_info info; 67 struct vfsconf vfc; 68 char *mountpt; 69 char *devpath; 70 int error; 71 int ch; 72 int mount_flags; 73 int init_flags; 74 75 bzero(&info, sizeof(info)); 76 mount_flags = 0; 77 init_flags = 0; 78 79 while ((ch = getopt(ac, av, "o:u")) != -1) { 80 switch(ch) { 81 case 'o': 82 getmntopts(optarg, mopts, &mount_flags, &info.hflags); 83 break; 84 case 'u': 85 init_flags |= MNT_UPDATE; 86 break; 87 default: 88 usage("unknown option: -%c", ch); 89 /* not reached */ 90 } 91 } 92 ac -= optind; 93 av += optind; 94 mount_flags |= init_flags; 95 96 error = getvfsbyname("hammer2", &vfc); 97 if (error) { 98 fprintf(stderr, "hammer2 vfs not loaded\n"); 99 exit(1); 100 } 101 102 /* 103 * Only the mount point need be specified in update mode. 104 */ 105 if (init_flags & MNT_UPDATE) { 106 if (ac != 1) { 107 usage("missing parameter (mountpoint)"); 108 /* not reached */ 109 } 110 mountpt = av[0]; 111 if (mount(vfc.vfc_name, mountpt, mount_flags, &info)) 112 usage("mount %s: %s", mountpt, strerror(errno)); 113 exit(0); 114 } 115 116 /* 117 * New mount 118 */ 119 if (ac != 2) { 120 usage("missing parameter(s) (dev@LABEL mountpt)"); 121 /* not reached */ 122 } 123 124 devpath = strdup(av[0]); 125 mountpt = av[1]; 126 127 if (devpath[0] == 0) { 128 fprintf(stderr, "mount_hammer2: empty device path\n"); 129 exit(1); 130 } 131 132 /* 133 * Automatically add @BOOT, @ROOT, or @DATA if no label specified, 134 * based on the slice. 135 */ 136 if (strchr(devpath, '@') == NULL) { 137 char slice; 138 139 slice = devpath[strlen(devpath)-1]; 140 141 switch(slice) { 142 case 'a': 143 asprintf(&devpath, "%s@BOOT", devpath); 144 break; 145 case 'd': 146 asprintf(&devpath, "%s@ROOT", devpath); 147 break; 148 default: 149 asprintf(&devpath, "%s@DATA", devpath); 150 break; 151 } 152 } 153 154 /* 155 * Connect to the cluster controller. This handles both remote 156 * mounts and device cache/master/slave mounts. 157 * 158 * When doing remote mounts that are allowed to run in the background 159 * the mount program will fork, detach, print a message, and exit(0) 160 * the originator while retrying in the background. 161 * 162 * Don't exit on failure, this isn't likely going to work for 163 * the root [re]mount in early boot. 164 */ 165 info.cluster_fd = cluster_connect(devpath); 166 if (info.cluster_fd < 0) { 167 fprintf(stderr, 168 "mount_hammer2: cluster_connect(%s) failed\n", 169 devpath); 170 } 171 172 /* 173 * Try to mount it, prefix if necessary. 174 */ 175 if (devpath[0] != '/' && devpath[0] != '@') { 176 char *p2; 177 asprintf(&p2, "/dev/%s", devpath); 178 free(devpath); 179 devpath = p2; 180 } 181 info.volume = devpath; 182 183 error = mount(vfc.vfc_name, mountpt, mount_flags, &info); 184 if (error < 0) { 185 if (errno == ERANGE) { 186 fprintf(stderr, 187 "%s integrated with %s\n", 188 info.volume, mountpt); 189 } else { 190 perror("mount: "); 191 exit(1); 192 } 193 } 194 free(devpath); 195 196 /* 197 * XXX fork a backgrounded reconnector process to handle connection 198 * failures. XXX 199 */ 200 201 return (0); 202 } 203 204 /* 205 * Connect to the cluster controller. We can connect to a local or remote 206 * cluster controller, depending. For a multi-node cluster we always want 207 * to connect to the local controller and let it maintain the connections 208 * to the multiple remote nodes. 209 */ 210 static 211 int 212 cluster_connect(const char *volume __unused) 213 { 214 struct sockaddr_in lsin; 215 int fd; 216 217 /* 218 * This starts the hammer2 service if it isn't already running, 219 * so we can connect to it. 220 */ 221 system("/sbin/hammer2 -q service"); 222 223 /* 224 * Connect us to the service but leave the rest to the kernel. 225 * If the connection is lost during the mount 226 */ 227 if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { 228 perror("socket"); 229 return(-1); 230 } 231 bzero(&lsin, sizeof(lsin)); 232 lsin.sin_family = AF_INET; 233 lsin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 234 lsin.sin_port = htons(DMSG_LISTEN_PORT); 235 236 if (connect(fd, (struct sockaddr *)&lsin, sizeof(lsin)) < 0) { 237 close(fd); 238 fprintf(stderr, "mount_hammer2: unable to connect to " 239 "cluster controller\n"); 240 return(-1); 241 } 242 243 return(fd); 244 } 245 246 static 247 void 248 usage(const char *ctl, ...) 249 { 250 va_list va; 251 252 va_start(va, ctl); 253 fprintf(stderr, "mount_hammer2: "); 254 vfprintf(stderr, ctl, va); 255 va_end(va); 256 fprintf(stderr, "\n"); 257 fprintf(stderr, " mount_hammer2 -u [-o opts] mountpt\n"); 258 fprintf(stderr, " mount_hammer2 [-o opts] dev@LABEL mountpt\n"); 259 fprintf(stderr, "\n"); 260 fprintf(stderr, "options:\n" 261 " <standard_mount_opts>\n" 262 " local\t- disable PFS clustering for whole device\n" 263 ); 264 exit(1); 265 } 266